Developing a library for mobile applications

Now there are a lot of books and talks that describe how to properly develop mobile applications. Various architectural directions have existed and developed for a long time, detailed guides have also been compiled. However, there is not enough information about how to write and develop libraries for applications correctly. Olga thinks that insufficient attention was paid to this topic and since she works in this area she wanted to share her knowledge, the mistakes, the conclusions made on their basis, and best practices.